The proportional system elects 54 members based on the proportion of votes per political party. The term of National Assembly members is four years.
The 19th National Assembly election on April 11, 2012 is a good illustration of the above-described process. The total voter turnout for this election was 54.2%. In particular, the constituency of Yecheongun (in Mungyeong-si, Gyeongsangbuk-do), the constituency of Namhae-gun and Hadong-gun (in Sacheon-si, Gyeongsangnam-do), and the constituency of Boeun-gun, Okcheon-gun, and Yeongdong-gun (in Chungcheongbuk-do) recorded the highest turnouts accounting for 68.4%, 65.9% and 65.8%, respectively. The voter turnout rates were higher in rural areas than urban areas such as Seoul and other metropolitan cities. Results from the election districts showed that the Saenuri Party received about 9.3 million votes (43.3%), followed by the Democratic Unionist Party with about 8.2 million votes (37.9%), and the Unified Progressive Party with about 1.3 million votes (6.0%). Geographically, the Saenuri Party showed dominance in Gyeongsangnam-do, Gyeongsangbuk-do, Busan, Daegu, Ulsan, and the capital area except for the City of Seoul, Chungcheongnam-do, Chungcheongbuk-do, and Gangwon-do. The Democratic Unionist Party dominated in of Seoul, Daejeon, Jeollanam-do and Jeollabuk-do. In the case of the proportional system, voting for political parties showed that the Saenuri Party received about 9.1 million (22.7%), followed by the Democratic Unionist Party with about 7.8 million votes (19.3%), and the Unified Progressive Party with about 2.2 million votes (5.5%). Like the results of the election districts, the Saenuri Party showed dominance in the capital area, Gyeongsangnam-do and Gyeongsanbukdo. And the Democratic Unionist Party dominated in Gwangju, Jeollanam-do and Jeollabuk-do.